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Troper48
Since: May, 2020
KD
Since: May, 2009
30th Jun, 2020 07:04:53 PM
I'd like to help, but I can only suggest looking at the Laughter Tropes index.
Troper48
Since: May, 2020
30th Jun, 2020 08:00:32 PM
Ok, I looked through that, but there doesn't seem to be anything matching this.
It looks like the characters are seriously considering something, but after a moment they all break out in laughter instead. Subtrope of Bait-and-Switch, inverse of Berate and Switch, similar to I Have Just One Thing to Say. Often overlaps with Tension-Cutting Laughter.
Examples: Get Out
Gus Johnson
I know there are others but I can't remember any off the top of my head.
Edited by Troper48